15349421 has 2 divisors, whose sum is σ = 15349422. Its totient is φ = 15349420.

The previous prime is 15349393. The next prime is 15349427. The reversal of 15349421 is 12494351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13875625 + 1473796 = 3725^2 + 1214^2 .

It is a cyclic number.

It is not a de Polignac number, because 15349421 - 2¹⁸ = 15087277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15349427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7674710 + 7674711.

It is an arithmetic number, because the mean of its divisors is an integer number (7674711).

Almost surely, 2^15349421 is an apocalyptic number.

It is an amenable number.

15349421 is a deficient number, since it is larger than the sum of its proper divisors (1).

15349421 is an equidigital number, since it uses as much as digits as its factorization.

15349421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 15349421 is about 3917.8337126530. The cubic root of 15349421 is about 248.5215189448.

The spelling of 15349421 in words is "fifteen million, three hundred forty-nine thousand, four hundred twenty-one".